If there is one rock solid proof of a higher power, it is the inherent moral code that dictates the thoughts, philosophies, behaviors, and actions of humanity including every tongue and tribe across the face of the earth.
Why do humans have a concept of right and wrong? No matter what our religious or non religious persuasion, political leanings, or socio-economic status, all humans know and feel the difference between right and wrong, whether they live by that code or not. Murder is wrong. So is pedophilia. So is theft. So is lying. But why do we know and feel this in the deepest depths of our soul?
If we lived in a strictly natural world governed by chance happenings of primordial soup and a long string of chemical accidents that happened at just the right time in order to create the right conditions for life, then where did humanity's sense of morality come from? More so, why were human beings the only species to evolve ahead enough to understand the concepts of not only morality, but time, physics, and space?
I posit that our sense of morality is derived from the soul, given to us by God. No amount of moral relativist thought can reverse this. Even those who try their very hardest to refute this by spouting ambiguous ramblings about morality being created by organized religion, being a by product of evolution, or being simply a figment of our imaginations like some Matrix sci-fi fantasy world with no real meaning know deep down that morality is something very real that can be felt in the soul and not constrained by the explanations of science.
Every human being has a soul. And we all understand the human concept of right vs. wrong. That is proof that God exists and that human beings are not just another species.